Subtract 75/18 from 30/84
1st number: 30/84, 2nd number: 4 3/18
30/84 - 75/18 is -80/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
30/84 = 30 × 3/84 × 3 = 90/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
75/18 = 75 × 14/18 × 14 = 1050/252 - Subtract the two like fractions:
90/252 - 1050/252 = 90 - 1050/252 = -960/252 - After reducing the fraction, the answer is -80/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/84-75/18 30/84-75/36 90/84-75/18 30/84-75/54 30/84-75/90